A dye is a colored substance that has an affinity to the substrate to which it is being applied.

A new approach is presented for analysis of microplastics in environmental samples, based on selective fluorescent staining using Nile Red (NR), followed by density-based extraction and filtration. The dye adsorbs onto plastic surfaces and renders them fluorescent when irradiated with blue light. Fluorescence emission is detected using simple photography through an orange filter. Image-analysis allows fluorescent particles to be identified and counted. Magnified images can be recorded and tiled to cover the whole filter area, allowing particles down to a few micrometres to be detected. The solvatochromic nature of Nile Red also offers the possibility of plastic categorisation based on surface polarity characteristics of identified particles. This article details the development of this staining method and its initial cross-validation by comparison with infrared (IR) microscopy. Microplastics of different sizes could be detected and counted in marine sediment samples. The fluorescence staining identified the same particles as those found by scanning a filter area with IR-microscopy.

Cyanine dyes can be used to quantify the amount of dsDNA within a sample. The linearity of fluorescence, as function of DNA amount of six dyes, is obtained by measuring the fluorescence intensity at the optimal excitation and emission maxima.


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Biotin NHS

Biotin NHS is an amino reactive biotin reagent used in the preparation of biotinylated surfaces or polypeptides.

  • CAS Number: 35013-72-0
  • MF: C14H19N3O5S
  • MW: 341.383
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: N/A
  • Melting Point: 212-214 °C
  • Flash Point: N/A

CY5-YNE

CY5-YNE is a reactive dye for the labeling of amino-groups in peptides, proteins, and oligonucleotides.

  • CAS Number: 1345823-20-2
  • MF: C36H43N3O7S2
  • MW: 693.87
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Hoechst 33342

Hoechst 33342 is a DNA minor groove binder used fluorochrome for visualizing cellular DNA.

  • CAS Number: 23491-52-3
  • MF: C27H28N6O
  • MW: 452.55
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: 268ºC
  • Flash Point: N/A

Methylproamine

Methylproamine is a DNA-binding radioprotector which, on the basis of published pulse radiolysis studies, acts by repair of transient radiation-induced oxidative species on DNA.IC50 Value: N/ATarget: DNA-binding radioprotectorin vitro: The extent of radioprotection at the clonogenic survival endpoint increased with methylproamine concentration up to a maximum dose modification factor (DMF) of 2.0 at 10 μM. At least 0.1 fmole/nucleus of methylproamine is required to achieve a substantial level of radioprotection (DMF of 1.3) with maximum protection (DMF of 2.0) achieved at 0.23 fmole/nucleus. The γH2AX focus yield per cell nucleus 45 min after irradiation decreased with drug concentration with a DMF of 2.5 at 10 μM [1]. Methylproamine-treated cells had fewer γH2AX foci after IR compared to untreated cells. Also, the presence ofmethylproamine decreased the amount of lower molecular weight DNA entering the gel as shown by the pulsed field gel electrophoresis assay [2]. Experiments with V79 cells have shown that methylproamine is approximately 100-fold more potent than the classical aminothiol radioprotector WR1065. The crystal structures of methylproamine and proamine complexes with the dodecamer d(CGCGAATTCGCG)(2) confirm that the new analogues also are minor groove binders [3].in vivo: N/AClinical trial: N/A

  • CAS Number: 188247-01-0
  • MF: C28H31N7
  • MW: 465.59300
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Dye 937

Dye 937, substituted unsymmetrical cyanine dyes with selected permeability, useful in the detection of DNA in electrophoretic gels.

  • CAS Number: 195199-04-3
  • MF: C32H37IN4S
  • MW: 636.63200
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

5-(Iodoacetamido)fluorescein

5-IAF is an idoacetamide derivate of fluoresceine.

  • CAS Number: 63368-54-7
  • MF: C22H14INO6
  • MW: 515.25400
  • Catalog: Dye Reagents
  • Density: 1.95 g/cm3
  • Boiling Point: 788.4ºC at 760 mmHg
  • Melting Point: 265-267ºC (dec.)(lit.)
  • Flash Point: 430.6ºC

Tris(4-aminophenyl)methane

Tris(4-aminophenyl)methane is a triphenylmethane dye. Tris(4-aminophenyl)methane is a weak HCV helicase inhibitor.

  • CAS Number: 548-61-8
  • MF: C19H19N3
  • MW: 289.37400
  • Catalog: Dye Reagents
  • Density: 1.208g/cm3
  • Boiling Point: 540.9ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 316.7ºC

4,5-Diaminofluorescein diacetate

DAF 2DA is most widely probe for NO measurement.

  • CAS Number: 205391-02-2
  • MF: C24H18N2O7
  • MW: 446.409
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 719.0±60.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 320.0±29.2 °C

5-Aminofluorescein

5-Aminofluorescein (5-AF) is a new fluorescence marker, covalently bound to human serum albumin (AFL-HSA) [1]5-aminofluorescein is a pH-sensitive biomaterial, is the targeted prodrug for synthesis of FA-FITC-Arg-PTX and FA-5AF- Glu-PTX..

  • CAS Number: 3326-34-9
  • MF: C20H13NO5
  • MW: 347.321
  • Catalog: Dye Reagents
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 695.3±55.0 °C at 760 mmHg
  • Melting Point: 223ºC
  • Flash Point: 374.3±31.5 °C

D-Luciferin (sodium salt)

D-Luciferin sodium salt is the substrate of luciferases that catalyze the production of light in bioluminescent insects.

  • CAS Number: 103404-75-7
  • MF: C11H7N2NaO3S2
  • MW: 302.305
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: 473.7ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 240.3ºC

7-Methyl-6-thioguanosine

MESG is a chromophoric substrate which can be used for the quantitation of inorganic phosphate.

  • CAS Number: 55727-10-1
  • MF: C11H15N5O4S
  • MW: 313.333
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: >175ºC (dec.)
  • Flash Point: N/A

Benzenepentacarboxylic Acid

Benzenepentacarboxylic acid (BA), a novel fluorescent probeas to detect and scavenge HO-.A specific and reproducible fluorescent probe of HO- developed is utilized to prove and detect the generation of HO- in H2O2/TAED and H2O2/TBCC alkali systems.

  • CAS Number: 1585-40-6
  • MF: C11H6O10
  • MW: 298.15900
  • Catalog: Dye Reagents
  • Density: 1.96g/cm3
  • Boiling Point: 642.3ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 356.3ºC

REACTIVE BLUE 2

Procion Blue HB (Reactive Blue 2) is a purinergic antagonist.

  • CAS Number: 12236-82-7
  • MF: C29H20ClN7O11S3
  • MW: 774.15700
  • Catalog: Dye Reagents
  • Density: 1.845 g/cm3
  • Boiling Point: N/A
  • Melting Point: >300ºC
  • Flash Point: N/A

Congo Red

Congo red is an azo dye. Congo red (CR) binding been used as a diagnostic test for the presence of amyloid in tissue sections.

  • CAS Number: 573-58-0
  • MF: C32H22N6Na2O6S2
  • MW: 696.663
  • Catalog: Dye Reagents
  • Density: 0.995 g/mL at 25 °C
  • Boiling Point: N/A
  • Melting Point: >360 °C(lit.)
  • Flash Point: N/A

Cyanine 3, SE

CY3-SE is a reactive dye for the labeling of amino-groups in biomolecules. CY3-SE is ideal for the labeling of soluble proteins, peptides, and oligonucleotides/DNA. Excitation (nm):555, Emission (nm): 570.

  • CAS Number: 146368-16-3
  • MF: C35H41N3O10S2
  • MW: 727.844
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Crystal Violet

Crystal violet is a triarylmethane dye.Target: OthersCrystal Violet is a component of Gram staining that allows one to recognize the difference between gram-positive and gram-negative bacteria with differential staining. The compound helps to access bacterial contamination of tissue culture samples. The staining response is due to the difference in the chemical and structural composition of the cell walls in different bacteria. Crystal Violet can also be used to test the different species of archaea and the cytostatic/cytotoxic effects on tumor cell lines [1-3].

  • CAS Number: 548-62-9
  • MF: C25H30ClN3
  • MW: 407.979
  • Catalog: Dye Reagents
  • Density: 1.19 g/cm3 (20ºC)
  • Boiling Point: N/A
  • Melting Point: 215ºC
  • Flash Point: 40ºC

Merbromin

Merbromin is a xanthene dye.

  • CAS Number: 129-16-8
  • MF: C20H10Br2HgNa2O6
  • MW: 752.67
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: ≥300 °C
  • Flash Point: N/A

Calcein Blue

Calcein Blue is a short-term, blue-fluorescent dye for labeling live cells.

  • CAS Number: 54375-47-2
  • MF: C15H15NO7
  • MW: 321.282
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 636.2±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 338.5±31.5 °C

Lucigenin

Lucigenin(L-6868; NSC-151912) is a chemiluminescent probe used to indicate the presence of endogenously generated superoxide anion radicals in cells.Upon single-electron reduction of Lucigenin by a radical species the subsequent form of Lucigenin presents an amplified chemiluminescence which is measurable and can be correlated to the respective amount of reactive radical species present in the system. This approach can be used to probe the natural generation of these species as well as the natural functioning of superoxide dismutase and other enzymes responsible for scavenging radicals. In addition to indicating the presence of radicals in cells, Lucigenin shows interaction with redox-active oxidoreductase enzymes. Lucigenin is shown to mediate the reduction of cytochrome C by xanthine oxidase and to increase the rate of NADPH oxidation. These observations indicate that use of Lucigenin for superoxide analysis is precluded in the presence of high levels of NAD(P)H-oxidoreductases.

  • CAS Number: 2315-97-1
  • MF: C28H22N4O6
  • MW: 510.497
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: 250ºC
  • Flash Point: N/A

BCDA

Esterase chromogenic substrate-1 is a chromogenic substrate of esterase used to detect the activity of esterase.

  • CAS Number: 3252-36-6
  • MF: C10H7BrClNO2
  • MW: 288.52500
  • Catalog: Dye Reagents
  • Density: 1.721g/cm3
  • Boiling Point: 429.3ºC at 760mmHg
  • Melting Point: 107 °C(dec.)
  • Flash Point: 213.4ºC

BCECF-AM

BCECF-AM is a cell membrane permeable compound, widely used as a fluorescent indicator for intracellular pH.

  • CAS Number: 117464-70-7
  • MF: C40H36O19
  • MW: 820.70
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 939.2±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 368.9±34.3 °C

Bromobimane

Bromobimane is essentially nonfluorescent and converts into fluorescent products when reacts with small thiols.

  • CAS Number: 71418-44-5
  • MF: C10H11BrN2O2
  • MW: 271.11100
  • Catalog: Dye Reagents
  • Density: 1.66g/cm3
  • Boiling Point: 327.8ºC at 760 mmHg
  • Melting Point: 152-154ºC
  • Flash Point: 152.1ºC

Hoechst 33258 analog 2

Hoechst stains are part of a family of blue fluorescent dyes used to stain DNA.IC50 Value:Target: These Bis-benzimides were originally developed by Hoechst AG, which numbered all their compounds so that the dye Hoechst 33342 is the 33342nd compound made by the company. There are three related Hoechst stains: Hoechst 33258, Hoechst 33342, and Hoechst 34580. The dyes Hoechst 33258 and Hoechst 33342 are the ones most commonly used and they have similarexcitation/emission spectra. Both dyes are excited by ultraviolet light at around 350 nm, and both emit blue/cyan fluorescent light around anemission maximum at 461 nm. Unbound dye has its maximum fluorescence emission in the 510-540 nm range. Hoechst dyes are soluble in water and in organic solvents such as dimethyl formamide or dimethyl sulfoxide. Concentrations can be achieved of up to 10 mg/mL. Aqueous solutions are stable at 2-6 °C for at least six months when protected from light. For long-term storage the solutions are instead frozen at ≤-20 °C.The dyes bind to the minor groove of double-stranded DNA with a preference for sequences rich in adenine andthymine. Although the dyes can bind to all nucleic acids, AT-rich double-stranded DNA strands enhance fluorescence considerably.Hoechst dyes are cell-permeable and can bind to DNA in live or fixed cells. Therefore, these stains are often called supravital, which means that cells survive a treatment with these compounds. Cells that express specific ATP-binding cassette transporter proteins can also actively transport these stains out of their cytoplasm.

  • CAS Number: 23491-54-5
  • MF: C26H26N6
  • MW: 422.52500
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Fluorescein isothiocyanate

FITC is a derivative of fluorescein for the labeling of amines.

  • CAS Number: 3326-32-7
  • MF: C21H11NO5S
  • MW: 389.381
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 708.6±60.0 °C at 760 mmHg
  • Melting Point: >360 °C(lit.)
  • Flash Point: 382.4±32.9 °C

Pyronin Y

Pyronin Y is an intercalating cationic dye that shows specificity towards RNA.

  • CAS Number: 92-32-0
  • MF: C17H19ClN2O
  • MW: 302.799
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: 250-260ºC(lit.)
  • Flash Point: N/A

3,3',4,4'-Biphenyltetramine tetrahydrochloride

3,3'-Diaminobenzidine(DAB) is an organic compound that is both chemically and thermodynamically stable; DAB has been used in immunohistochemical staining of nucleic acids and proteins.

  • CAS Number: 7411-49-6
  • MF: C12H18Cl4N4
  • MW: 360.110
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: 481.7ºC at 760 mmHg
  • Melting Point: 300°C
  • Flash Point: 282.7ºC

Indo-1 AM

Indo-1 AM is a fluorescent Ca2+ indicator (λex=340 nm, λem=405/485 nm).

  • CAS Number: 112926-02-0
  • MF: C47H51N3O22
  • MW: 1009.91000
  • Catalog: Dye Reagents
  • Density: 1.374g/cm3
  • Boiling Point: 1009.2ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 564.1ºC

6-FITC

6-Fluorescein isothiocyanate(6-FITC) is a derivative of fluorescein used in wide-ranging applications including flow cytometry.

  • CAS Number: 3326-31-6
  • MF: C21H11NO5S
  • MW: 389.381
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 719.1±60.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 388.7±32.9 °C

AA-dUTP sodium salt

AA-dUTP sodium salt is a fluorescent dye which can be used to stain cDNA.

  • CAS Number: 936327-10-5
  • MF: C12H20N3O14P3.xNa
  • MW: 546.21000
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

C-Phycocyanin

C-phycocyanin is a water-soluble protein pigment which is also widely used as an excellent nutrient supplement for human beings.

  • CAS Number: 11016-15-2
  • MF:
  • MW:
  • Catalog: Peptides
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A